Insect repellants
Orange peel may be rubbed across exposed skin to serve as an insect repellant; lavender and cedar oil are also effective in repelling insects.

Insect bites and sunburn
Aloe Vera is beneficial in treating bites and burns. You can use the gel of an Aloe Vera plant from your home or purchase a gel product (100% organic gel is recommended) from a health food store or pharmacy. Chilled witch hazel, white or apple cider (organic with the mother in it is recommended) may be used to decrease the itching of bites.

Insect bites and stings
Activated charcoal is an effective treatment for spider or other bites and stings. First, remove any stingers. Use clean water to make a paste of the charcoal and apply it to the affected area. A piece of plastic wrap covered with a bandage will keep the charcoal paste in place. (This is also an excellent remedy for boils or pimples.) A paste of baking soda and cool water is an excellent antidote for stings.

Note: If an insect bite or sting creates an allergic reaction resulting in abnormal swelling, welts, difficulty in breathing or signs of shock, obtain emergency medical assistance.
Excerpt from Handbook for Healers